Gear loss factor using the load distribution model for varying contact ratio in spur gear drive for improved bending strength

Abstract

Abstract Gear loss factor is one of the imperative parameter in estimating the power loss in a meshing gear pair. This paper demonstrates the prediction of gear loss factor parameter in spur gear drive using the load distribution technique. The aptness of two distinct contact ratios is studied and compared in this paper: Normal Contact Ratio (NCR) and High Contact Ratio (HCR). The described model is studied for gearing strength which is improved through profile modification technique. The ultimate focus is to enhance the gearing strength of the pinion in a spur gear drive by discovering the optimal modification point in the tooth profile with at most balanced stresses in the gear pair considered for the study. Using contact analysis, the stresses developed over the contracting surfaces are predicted through finite element method and it is balanced between the gear and pinion. A gear loss factor is predicted along the path of contact for a complete meshing cycle for this balanced drive. It is uncovered that the methodology utilized encourages significant decrease in the gear loss factor of the HCR pair which is confined with the literature models. The values predicted using the load distribution model shows that the high contact ratio gear drive with increased addendum height has the gear loss factor minimum compared with a normal contact ratio gear drive.